Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, you might think the bicycle was invented in the 19th century, but its predecessor, the draisine, appeared in 1817. However, it wasn't until the 1880s that the safety bicycle, with two equal-sized wheels and a chain drive, became popular. This design made cycling much safer and more accessible to the general public. Interestingly, the pneumatic tire, invented in 1888 by John Boyd Dunlop, was initially developed for bicycles, not cars. This innovation greatly improved comfort and speed. By the early 20th century, bicycles had become a major mode of transport in many cities.
❓ Según la conferencia, ¿cuál fue la razón principal por la que la bicicleta de seguridad se hizo popular en la década de 1880?
A. A. Era más barato de fabricar que los modelos anteriores.
B. B. Contaba con transmisión por cadena y ruedas de igual tamaño, lo que la hacía más segura.
C. C. Fue la primera bicicleta en utilizar neumáticos.
D. D. Fue inventado por John Boyd Dunlop.
✅ 正确答案
B. It featured a chain drive and equal-sized wheels, making it safer.